“J” is for Jepsenella

J is for Jepsenella

Jepsenella is a member of the extinct order of mammals, the Cimolesta. There is currently quite a bit of argument about where the Cimolesta fits into the rest of the Class Mammalia. Some put them close to carnivores, like creodonts. Others think they might be close to modern pangolins. Gelastops is also a member of the Order Cimolesta.

More recently, Jepsenella has been placed in the Order Insectivora, Family Apatemyadae, which is very similar to the plesiadapid primates like Chiromyoides, due to similarities in the types and shapes of teeth.

Here’s a complete dentition of Labidolemur, an insectivore related to Jepsenella.

Dentition of Labidolemur kayi, an apatemyid from the Late Paleocene to Early Eocene of North America.

When I was doing my doctoral research, Jepsenella was still considered close to carnivores. I had a tooth I thought was of a carnivore, and I spent a great deal of time comparing it to Pararyctes and Paleoryctes, which are creodont carnivores.

Paleoryctes from The Breaks.
Paleoryctes from The Breaks.

Here’s the notes I took as I made the comparison between my specimen and Jepsenella from the American Museum of Natural History.

Notes on my comparison of Paleoryctes with Pararyctes and Jepsenella from the American Museum
Notes on my comparison of Paleoryctes with Pararyctes and Jepsenella from the American Museum

Part of the Blogging from A to Z challenge.

For 4-11-13

Published by paleololigo

Scientist (Paleontology, Geochemistry, Geology); Writer (Speculative and Science Fiction, plus technical and non-technical Science); Mom to great boy on the Autism spectrum; possessor of too many hobbies.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: